ANATOMY

Detailed explanation-1: -Constriction in the afferent arterioles going into the glomerulus and dilation of the efferent arterioles coming out of the glomerulus will decrease GFR. Hydrostatic pressure in the Bowman’s capsule will work to decrease GFR.

Detailed explanation-2: -So, the correct answer is ‘An increase in afferent arteriolar pressure’.

Detailed explanation-3: -Capillary hydrostatic pressure (Pc) and Bowman’s space oncotic pressure (i) favor filtration into the tubule, and Bowman’s space hydrostatic pressure (Pi) and capillary-oncotic pressure (c) oppose filtration.

Detailed explanation-4: -This means that a pressure of only 10mm Hg causes a normal amount of plasma (minus plasma proteins) to filter from the glomerulus into the capsular space.

Detailed explanation-5: -Increases in the glomerular capillary hydrostatic pressure cause increases in net filtration pressure and GFR. However, increases in Bowman space hydrostatic pressure causes decreases in filtration pressure and GFR. This may result from ureteral constriction.